CN104787111B - A kind of control valve for steering - Google Patents
A kind of control valve for steering Download PDFInfo
- Publication number
- CN104787111B CN104787111B CN201510193340.5A CN201510193340A CN104787111B CN 104787111 B CN104787111 B CN 104787111B CN 201510193340 A CN201510193340 A CN 201510193340A CN 104787111 B CN104787111 B CN 104787111B
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- Prior art keywords
- valve
- steering
- oil
- oil inlet
- oil outlet
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/08—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of steering valve used
- B62D5/083—Rotary valves
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
A kind of control valve for steering.Solve the problems, such as that existing steering steering supplies shortage of oil and system effectiveness is low.It includes selector valve and reversal valve, the reversal valve is connected by selector valve with steering gear, the reversal valve has so that the first position that the first oil inlet is connected by the first oil outlet with the first steering cylinder, second place during suspension and the third place that the first oil inlet is connected by the 4th oil outlet with the second steering cylinder, second oil inlet is connected when reversal valve is in first position with the first oil outlet, and the 3rd oil inlet is connected when reversal valve is in the third place with the 4th oil outlet.The output oil control guide oil of steering gear is synchronously input to steering cylinder by the present invention so that product turns to reliably, and system effectiveness is high.
Description
Technical field
The present invention relates to a kind of wheel steering system, and in particular to a kind of control valve for steering.
Background technology
Steering, which has, rationally utilizes system power, and smooth operation is light, and compact-sized and steering flexibility and reliability etc. is excellent
Point, the application on loading machine are very extensive.Attached drawing 1 is the steering circuit of present loading machine, steering gear by low voltage control oil pump feed,
Guide's oil circuit as multi-way valve.When steering gear stops operating, guide oil is cut off, and no pressure oil acts on multi-way valve
Commutate valve rod both ends, vehicle maintains the original state traveling.The oil of steering pump enters machining device hydraulic system for PF mouthfuls by pressure-gradient control valve.
When steering gear rotates, the tach signal of steering wheel is converted into flow signal by steering gear, is acted on and is turned on reversal valve, due to
The presence of restriction is measured on commutation valve rod, steering gear rotation is faster, and steering reversal valve both ends pressure difference is bigger, switching valve opening
Bigger, turning velocity is faster.The steering has the following disadvantages：Pretended in non-steering state downward driving, parking and shovel
During industry, since steering cylinder bears to load, this load signal passes to pressure-gradient control valve by shuttle valve, makes steering pump in non-steering state
Lower high pressure kicks, cause that Hydraulic System Fever and digging force, tractive force are unstable, and system effectiveness is low；Steering gear is supplied by control pump
Oil, the guide oil of steering gear only control switching valve to commutate, may not flow into steering cylinder, and there are energy loss.
The content of the invention
To solve the problems, such as that existing steering steering cylinder supplies shortage of oil in background technology and system effectiveness is low, the present invention
A kind of control valve for steering is provided.
The technical scheme is that：A kind of control valve for steering, including multi-way valve, the multi-way valve bag
Include selector valve and reversal valve, the reversal valve include the first oil inlet, the second oil inlet, the 3rd oil inlet, the 4th oil inlet,
First oil outlet, the second oil outlet, the 3rd oil outlet, the 4th oil outlet and switching valve control mouth, the selector valve include choosing
Select valve oil outlet, the selector valve oil inlet being connected respectively with steering gear oil outlet and selector valve control mouth；Reversal valve first into
Hydraulic fluid port be used for be connected with steering pump, selector valve oil outlet respectively with the second oil inlet, the 3rd oil inlet, switching valve control mouth phase
Connection, the reversal valve have first that the first oil inlet is connected by the first oil outlet with the first steering cylinder
Put, second place during suspension and make it that the first oil inlet is connected by the 4th oil outlet with the second steering cylinder the 3rd
Put, second oil inlet is fuel-displaced by the second oil outlet, the first check valve and first when reversal valve is in first position
Mouthful it is connected, the 3rd oil inlet passes through the 3rd oil outlet, the second check valve and the when reversal valve is in the third place
Four oil outlets are connected.
As a modification of the present invention, the selector valve oil inlet has two, and the two selector valve oil inlets lead to
Steering gear is crossed to be connected.
As a further improvement on the present invention, the 4th oil inlet of reversal valve by repairing check valve respectively with first
Oil outlet, the 4th oil outlet are connected.
As a further improvement on the present invention, the reversal valve is equipped with valve body and valve rod, and the valve rod is equipped with
So that the restriction that valve rod coordinates with valve body sliding.
As a further improvement on the present invention, the multi-way valve further includes two and flows to opposite safety overflow valve, institute
Two safety overflow valves stated are arranged side by side on the pipeline between the first steering cylinder, the second steering cylinder and reversal valve.
As a further improvement on the present invention, the multi-way valve further includes main overflow valve, and the main overflow valve includes
Overflow valve oil inlet and overflow valve oil outlet, overflow valve oil inlet are connected with steering pump, the overflow valve oil outlet and oil
Case is connected.
As a further improvement on the present invention, the selector valve is three six logical spring reset pilot operated valve devices.
As a further improvement on the present invention, the reversal valve is three eight logical pilot operated valve devices.
The invention has the advantages that when steering gear rotates, the turn signal of steering wheel is changed into flow and believed by steering gear
Number, which acts on multi-way valve, and pilot control oil promotes the sliding of reversal valve valve rod, and single eventually through first or second
Enter steering cylinder to valve, system effectiveness further improves.
Brief description of the drawings
Attached drawing 1 is the hydraulic principle schematic diagram of existing steering.
Attached drawing 2 is the hydraulic principle schematic diagram of the embodiment of the present invention.
Attached drawing 3 is the hydraulic principle schematic diagram of multi-way valve 5 in attached drawing 2.
Attached drawing 4 is the structure diagram of multi-way valve 5 in attached drawing 2.
Attached drawing 5 is the schematic cross-sectional view of C-C in attached drawing 4.
In figure, 1, fuel tank；2nd, steering pump；3rd, the second steering cylinder；4th, steering gear；5th, multi-way valve；51st, selector valve；52nd, change
To valve；521st, valve body；522nd, valve rod；523rd, restriction；53rd, the first check valve；54th, the second check valve；55th, repairing check valve；
56th, safety overflow valve；57th, main overflow valve；6th, the first steering cylinder.
Embodiment
Embodiments of the present invention is further illustrated below in conjunction with the accompanying drawings：
As shown in Fig. 2 combinations Fig. 3,4,5, a kind of control valve for steering, including multi-way valve 5, steering is led to
Often include fuel tank 1, steering pump 2, steering gear 4, multi-way valve 5, the first steering cylinder 6 and the second steering cylinder 3, described is more
Road valve 5 includes selector valve 51 and reversal valve 52, and specifically, the steering pump is variable pump.Specifically, the selection
Valve 51 is three six logical spring reset pilot operated valve devices, and the reversal valve 52 is three eight logical pilot operated valve devices, and the multi-way valve includes
Selector valve and reversal valve, the reversal valve 52 include the first oil inlet, the second oil inlet, the 3rd oil inlet, the 4th oil inlet,
First oil outlet, the second oil outlet, the 3rd oil outlet, the 4th oil outlet and switching valve control mouth, wherein the second oil inlet and
Two oil outlets are corresponding, and the 3rd oil inlet is opposite with the 3rd oil outlet；The switching valve control mouth has two and is used to control
Valve rod processed slides so that the second oil inlet is turned on the second oil outlet or the 3rd oil inlet is turned on the 3rd oil outlet.Described
Selector valve 51 includes selector valve oil outlet, the selector valve oil inlet being connected respectively with steering gear oil outlet and selector valve control
Mouthful；The steering gear includes steering gear oil inlet and steering gear oil outlet, and the steering gear has the first state stopped
With the second state of steering；The steering pump 2 is connected with the first oil inlet of reversal valve, steering gear oil inlet, the steering
Device oil outlet is connected with selector valve oil inlet, selector valve control mouth, and specifically, the selector valve oil inlet has two,
And the two selector valve oil inlets are connected by steering gear, more specifically, the two selector valve oil inlets are at steering gear
It is connected when first state by steering gear.Specifically, when steering gear is in middle position, multi-way valve both ends pass through in steering gear
Portion is linked up, and pressure at two ends is equal, does not turn to.More specifically, steering gear oil outlet at least two, the second state bag
The first position turned left and the right-handed second place are included, more specifically, operation principle is identical during the second state of steering gear,
The direction being simply diverted to is different, and the delivery outlet of output hydraulic pressure oil is different.When steering gear is in the second state, selector valve oil inlet
Mouth, selector valve control mouth are connected with steering gear oil outlet, specifically, when steering gear is in the second state first position
When, a steering gear oil outlet of steering gear is connected with selector valve oil inlet P a；When steering gear is in the second state second
When putting, another steering gear oil outlet of steering gear is connected with selector valve oil inlet P b；Selector valve oil inlet in system during work
There is two-way and principle is identical, only choose oil inlet all the way for convenience and be described, similarly hereinafter.Selector valve oil outlet is respectively with
Two oil inlets, the 3rd oil inlet, switching valve control mouth are connected, and specifically, selector valve oil outlet has two, one of choosing
Valve oil outlet to be selected with the second oil inlet to be connected, another is connected with the 3rd oil inlet, and switching valve control mouth has two, point
It is not connected with two selector valve oil outlets, for controlling the sliding of reversal valve valve rod.The reversal valve 52 has so that the
The first position that one oil inlet is connected by the first oil outlet with the first steering cylinder 6, second place during suspension and so that
The third place that first oil inlet is connected by the 4th oil outlet with the second steering cylinder 3, second oil inlet are changing
Be connected when being in first position to valve by the second oil outlet, the first check valve 53 with the first oil outlet, the described the 3rd into
Hydraulic fluid port is connected when reversal valve is in the third place by the 3rd oil outlet, the second check valve 54 with the 4th oil outlet.Specifically
Say, first, second, third and fourth oil inlet of reversal valve is located at the left side of reversal valve, and rehearses from top to bottom successively；Reversal valve
First, second, third and fourth oil outlet is located at the right side of reversal valve, and rehearses from top to bottom successively（Referring to attached drawing 3）.The present invention's has
Beneficial effect is only to provide a steering pump to system fuel feeding, and the net synchronization capability of system is more preferable, reduces production cost, avoids turning
To pump under non-steering state high pressure kicks.When steering gear rotates, the turn signal of steering wheel is changed into flow and believed by steering gear
Number, which acts on multi-way valve, and pilot control oil promotes the sliding of reversal valve valve rod, and single eventually through first or second
Enter steering cylinder to valve, system effectiveness further improves.
The 4th oil inlet of reversal valve is connected with the first oil outlet, the 4th oil outlet respectively by repairing check valve 55
It is logical.Such structure is further ensured that pressure oil when the first steering cylinder and the second steering cylinder work.
The reversal valve 52 is equipped with valve body 521 and valve rod 522, the valve rod 522 be equipped with so that valve rod 522 with
The restriction 523 that the sliding of valve body 521 coordinates.When steering gear rotates, the turn signal of steering wheel is changed into flow and believed by steering gear
Number, which acts on valve rod both ends by the restriction on valve rod, valve rod is commutated, and pilot control oil promotes reversal valve valve
Bar slides, and enters steering cylinder eventually through the first or second check valve, and system effectiveness further improves.
The multi-way valve 5 further includes two and flows to opposite safety overflow valve 56, described two safety overflow valves 56
It is arranged side by side on the pipeline between the first steering cylinder 6, the second steering cylinder 3 and reversal valve 52.The setting of safety overflow valve
So that output of products pressure stability, improves security performance during product work.
The multi-way valve 5 further includes main overflow valve 57, and the main overflow valve 57 includes overflow valve oil inlet and overflow
Valve oil outlet, overflow valve oil inlet are connected with steering pump, and the overflow valve oil outlet is connected with fuel tank.Such structure
So that system has more preferable security performance.
Every technical staff's notice：Although the present invention is described according to above-mentioned embodiment, of the invention
Invention thought be not limited in the invention, any repacking with inventive concept, will all include this patent protection of the patent right
In the range of.
Claims (6)
- A kind of 1. control valve for steering, it is characterised in that:Including multi-way valve, the multi-way valve include selector valve and Reversal valve, the reversal valve include the first oil inlet, the second oil inlet, the 3rd oil inlet, the 4th oil inlet, first fuel-displaced Mouth, the second oil outlet, the 3rd oil outlet, the 4th oil outlet and switching valve control mouth, it is fuel-displaced that the selector valve includes selector valve Mouth, the selector valve oil inlet being connected respectively with steering gear oil outlet and selector valve control mouth；The first oil inlet of reversal valve is used for It is connected with steering pump, selector valve oil outlet is connected with the second oil inlet, the 3rd oil inlet, switching valve control mouth respectively, institute The reversal valve stated has so that the first position that the first oil inlet is connected by the first oil outlet with the first steering cylinder, stops When the second place and cause the third place that is connected by the 4th oil outlet with the second steering cylinder of the first oil inlet, it is described The second oil inlet be connected when reversal valve is in first position by the second oil outlet, the first check valve with the first oil outlet Logical, the 3rd oil inlet is fuel-displaced by the 3rd oil outlet, the second check valve and the 4th when reversal valve is in the third place Mouth is connected, and the multi-way valve further includes two and flows to opposite safety overflow valve, and described two safety overflow valves are side by side It is arranged on the pipeline between the first steering cylinder, the second steering cylinder and reversal valve, the 4th oil inlet of reversal valve leads to Repairing check valve is crossed respectively with the first oil outlet, the 4th oil outlet to be connected.
- A kind of 2. control valve for steering according to claim 1, it is characterised in that the selector valve oil inlet Mouth has two, and the two selector valve oil inlets are connected by steering gear.
- 3. a kind of control valve for steering according to claim 1, it is characterised in that set on the reversal valve There are valve body and valve rod, the valve rod is equipped with so that the restriction that valve rod coordinates with valve body sliding.
- 4. a kind of control valve for steering according to claim 1, it is characterised in that the multi-way valve also wraps Main overflow valve is included, the main overflow valve includes overflow valve oil inlet and overflow valve oil outlet, overflow valve oil inlet and steering pump It is connected, the overflow valve oil outlet is connected with fuel tank.
- 5. a kind of control valve for steering according to claim 1, it is characterised in that the selector valve is three The logical spring reset pilot operated valve device in position six.
- 6. a kind of control valve for steering according to claim 1, it is characterised in that the reversal valve is three The logical pilot operated valve device in position eight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510193340.5A CN104787111B (en) | 2015-04-23 | 2015-04-23 | A kind of control valve for steering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510193340.5A CN104787111B (en) | 2015-04-23 | 2015-04-23 | A kind of control valve for steering |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104787111A CN104787111A (en) | 2015-07-22 |
| CN104787111B true CN104787111B (en) | 2018-04-24 |
Family
ID=53552407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510193340.5A Active CN104787111B (en) | 2015-04-23 | 2015-04-23 | A kind of control valve for steering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104787111B (en) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4062085B2 (en) * | 2002-12-18 | 2008-03-19 | 株式会社豊田自動織機 | Electric industrial vehicle steering system |
| CN2618860Y (en) * | 2003-04-22 | 2004-06-02 | 汤有泉 | Controller of steering engine oil path |
| US7124579B1 (en) * | 2005-05-09 | 2006-10-24 | Eaton Corporation | Anti jerk valve |
| JP5388461B2 (en) * | 2008-03-21 | 2014-01-15 | 株式会社小松製作所 | Steering device |
| EP2450263B1 (en) * | 2009-07-02 | 2015-08-12 | Hitachi Construction Machinery Co., Ltd. | Transport vehicle |
| CN201677921U (en) * | 2010-05-20 | 2010-12-22 | 镇江液压件厂有限责任公司 | Load sensing priority steering control integrated type full hydraulic steering gear |
| CN203111304U (en) * | 2012-12-27 | 2013-08-07 | 镇江液压件厂有限责任公司 | Middle position unloading hydraulic steering gear |
| CN104192201B (en) * | 2014-08-18 | 2016-06-29 | 柳州柳工液压件有限公司 | Hydraulic steering control valve and hydraulic steering system |
| CN104192202B (en) * | 2014-09-05 | 2016-07-06 | 徐工集团工程机械股份有限公司科技分公司 | Loading machine steering hydraulic system with shuttle valve structure |
| CN204124188U (en) * | 2014-09-05 | 2015-01-28 | 徐工集团工程机械股份有限公司科技分公司 | With the loading machine steering hydraulic system of shuttle valve structure |
| CN204605933U (en) * | 2015-04-23 | 2015-09-02 | 圣邦集团有限公司 | A kind of control cock for steering swivel system |
-
2015
- 2015-04-23 CN CN201510193340.5A patent/CN104787111B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104787111A (en) | 2015-07-22 |
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